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In a recent study of the effectiveness of streptokinase in the treatment of patients who have been hospitalized after myocardial infarction, 9 of 199 males receiving streptokinase and 13 of 97 males in the control group died within 12 months.
a) Find a 95% confidence interval for the difference in the proportion of deaths between the streptokinase and the control group.
b) At a level of α of 1%, can we conclude that the proportion of deaths in the streptokinase group is smaller than that of the control group? What is the p-value? Explain the meaning of this p-value in your own words.
c) Can you conclude that the proportion of deaths in the streptokinase group is less than 5%. Use α = 2%. What is the p-value?
d) For the streptokinase group, if you wish to estimate the proportion of deaths to within 2% of the true value, with a level of confidence of 90%, how many samples would you have to select?
Examine the relationship between final grade and the reported hours per week each student said they studied for the course. Do we have evidence that females are being discriminated against?
To avoid the problem of not having access to Tables of F distribution with values given for the lower tail, the numerator of the test statistic should be the one with:
prevent coronary artery vasoconstriction and the attendant reduction in blood flow to the heart and mechanical function.
In this paragraph, be sure to make it clear how you handled the issue of conducting three planned comparisons. Also provide the ANOVA summary table for these results.
What can we conclude from this summary, Which of the following statements is correct and In which of the following situations would permutation tests be suitable
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Jamie expects that a bulb will last for 400 to 500 days, what is the probability of an Acme bulb satisfying that?
A radio station wants to know if residents in their area are in favor of a proposed tax increase. They invite listeners to call in to respond to the poll. 645 of the 800 who responded were against the tax.
An old saying in golf is "you drive for show and you putt for dough." The point is that good putting is more important than long driving for shooting low scores and hence winning money.
Give three logically possible directions of casualty, indicating for each direction whether it is a reasonable explanation for the correlation in light of the variables involved (and why).
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